// wraps an existing native instance, with downcast support
public static T WrapNative <T>(IntPtr native) where T : RefCounted
{
if (native == IntPtr.Zero)
{
return(null);
}
RefCounted r;
WeakReference <RefCounted> w;
// first see if we're already available
if (nativeLookup.TryGetValue(native, out w))
{
if (w.TryGetTarget(out r))
{
// we're alive!
return((T)r);
}
else
{
// we were seen before, but have since been GC'd, remove!
nativeLookup.Remove(native);
if (csb_Atomic_RefCounted_Refs(native) == 1)
{
// only managed ref remains, so release and return null
csb_AtomicEngine_ReleaseRef(native);
return(null);
}
csb_AtomicEngine_ReleaseRef(native);
}
}
IntPtr classID = RefCounted.csb_Atomic_RefCounted_GetClassID(native);
// and store, with downcast support for instance Component -> StaticModel
// we never want to hit this path for script inherited natives
NativeType nativeType;
if (!nativeClassIDToNativeType.TryGetValue(classID, out nativeType))
{
throw new System.InvalidOperationException("NativeCore.WrapNative - Attempting to wrap unknown native class id");
}
r = nativeType.managedConstructor(native);
w = new WeakReference <RefCounted>(r);
NativeCore.nativeLookup[native] = w;
// store a ref, so native side will not be released while we still have a reference in managed code
r.AddRef();
return((T)r);
}
// wraps an existing native instance, with downcast support
public static T WrapNative <T> (IntPtr native) where T : RefCounted
{
if (native == IntPtr.Zero)
{
return(null);
}
// instance id
uint id = csb_Atomic_RefCounted_GetRefID(native);
WeakReference w;
// first see if we're already available
if (nativeLookup.TryGetValue(id, out w))
{
if (w.IsAlive)
{
// we're alive!
return((T)w.Target);
}
else
{
// we were seen before, but have since been GC'd, remove!
nativeLookup.Remove(id);
}
}
IntPtr classID = RefCounted.csb_Atomic_RefCounted_GetClassID(native);
// and store, with downcast support for instance Component -> StaticModel
// we never want to hit this path for script inherited natives
RefCounted r = nativeClassIDToManagedConstructor[classID](native);
w = new WeakReference(r);
NativeCore.nativeLookup [id] = w;
// store a ref, so native side will not be released while we still have a reference in managed code
r.AddRef();
return((T)r);
}
